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A model for optimum functional human jaw movements based on values associated with preferred chewing patterns.

R J Wilding1, A Lewin

  • 1Department of Oral Biology, Faculty of Dentistry, University of the Western Cape, Tygerberg, Republic of South Africa.

Archives of Oral Biology
|January 1, 1991
PubMed
Summary

This study analyzed jaw movements during chewing in 15 subjects, revealing that preferred chewing sides exhibit distinct movement patterns. These findings help understand optimal jaw function and chewing preferences.

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Area of Science:

  • Biomechanics
  • Dental Science
  • Human Movement Analysis

Background:

  • Understanding jaw movement patterns during mastication is crucial for diagnosing occlusal disorders.
  • Previous studies have explored jaw kinematics, but a detailed analysis of preferred chewing side characteristics is less common.

Purpose of the Study:

  • To investigate and quantify jaw movement variables associated with preferred chewing sides.
  • To identify characteristics of jaw pathways that correlate with chewing side preference.

Main Methods:

  • Recorded jaw movements in 15 healthy subjects using a sirognathograph during voluntary chewing.
  • Utilized a computer program for graphic display of jaw closing strokes in the frontal plane.
  • Applied multiple regression analysis to model the relationship between jaw movement variables and chewing preference.

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Main Results:

  • Statistical differences in jaw movement were observed between right and left sides in 10 out of 15 subjects.
  • A broad chewing pathway with bilateral distribution and a wide sagittal pathway were identified as characteristics associated with chewing preference.
  • A predictive model was developed linking four jaw movement variables to a preference index.

Conclusions:

  • Chewing side preference is associated with specific, quantifiable jaw movement patterns.
  • Identifying these movement variables can provide insights into optimal jaw function during mastication.
  • Further research can utilize these findings for clinical assessments and understanding functional adaptations in chewing.